JPH08169054A - Cable laying and pipeline repairing method - Google Patents

Abstract

PURPOSE: To provide a cable laying and pipeline repairing method in which the passage of a cable is facilitated without excessively narrowing the opening area of the pipeline and the laying of the cable and the repairing of the pipeline can be simultaneously conducted. CONSTITUTION: A groove 1a is longitudinally linearly formed on the part of the inner peripheral wall of a pipeline 1, a pipe 14 for passing a cable is embedded in the recess 1a, curable resin is impregnated to insert a tube lining material 15 in the pipeline 1, the resin impregnated is cured with the material 15 pressed to the inner peripheral wall of the pipeline 1, and then the cable is passed through the pipe 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable laying and conduit repairing method for simultaneously laying cables and repairing conduits.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the ground is aged, the inner peripheral surface of the pipeline is lined without excavating the pipeline from the ground. A pipeline repair method for repairing is known. This pipe repairing method involves inserting a pipe lining material made by impregnating a curable resin into a flexible tubular non-woven fabric while inverting it into the pipe by fluid pressure and pressing it against the inner peripheral surface of the pipe. In this method, while maintaining this state, the pipe lining material is heated to cure the curable resin impregnated therein, thereby lining the inner peripheral surface of the pipe line.

By the way, in recent years, multimedia has come into the limelight, but in order to realize this multimedia, it is necessary to solve the problem of laying cables such as optical fibers for communication.

Thus, as one method of laying a cable,
There has been proposed a method of laying a cable at the same time when the pipe repairing method is applied to an aged pipe. In this method, as shown in FIG. 15, a pipe 11 for cable passage is used.
4 is drawn into the inner bottom of the pipe 101, the inner peripheral surface of the pipe 101 is lined by the pipe repairing method using the pipe lining material 115, and finally a cable (not shown) is passed through the pipe 114. It is a method of making a line.

[0005]

However, as shown in FIG.
In the conventional method shown in (1), since the pipe lining material 115 rises in the portion of the pipe 114, there is a problem that the opening area of the pipe line 101 is excessively narrowed. In addition, in reality, the pipe 114 does not have a straight line, and since it is curved, it is difficult to pass a cable through the pipe 114.

The present invention has been made in view of the above problems, and a purpose of the present invention is not to reduce the opening area of a pipeline excessively, to facilitate the passage of a cable, and to lay the cable. It is an object of the present invention to provide a cable laying and pipeline repairing method that can simultaneously repair pipelines.

[0007]

In order to achieve the above object, the invention according to claim 1 forms a concave groove in a part of an inner peripheral wall of a pipe line in a straight line in a longitudinal direction, and the concave groove is formed in the concave groove. After embedding a pipe for cable passage or a cable body, insert a pipe lining material impregnated with a curable resin into the pipe line,
The curable resin impregnated in the pipe lining material is cured while being pressed against the inner peripheral wall of the pipe line.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the pipe lining material is reversely inserted into the pipe line by a fluid pressure.

Further, the invention according to claim 3 is the invention according to claim 2 or 3, wherein the cable is connected to the pipe by inserting a pig connected to the cable into the pipe. Is performed by vacuuming.

[0010]

According to the first and second aspects of the invention, the pipe for cable passage or the cable main body is embedded in the concave groove formed in the inner peripheral wall of the pipe line in a straight line, and then the pipe lining material is provided. Since the inner peripheral wall of the pipeline is lined by the well-known pipeline repair method used, the pipe does not deform the pipe lining material and the opening area of the pipeline is not narrowed excessively. Can be repaired at the same time. Further, since the pipe is arranged in a straight line along the concave groove, it is possible to easily carry the cable through the pipe.

According to the third aspect of the invention, the pig inserted into the pipe is moved from one end to the other end by evacuating one end of the pipe, so that the pig is connected to the pipe. The cable is easily routed to the pipe.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 11 are views showing the method of the present invention in the order of steps, FIG. 1 is a side sectional view showing a state in which a groove is formed in a pipe line, and FIG. 2 is A-A in FIG. 3 is a sectional view taken along the line, FIG. 3 is a side sectional view of a conduit having a groove, and FIG.
Line sectional view, FIG. 5 is a sectional view taken along line CC of FIG. 4, FIG. 6 is a side sectional view of a pipe line in which a pipe is embedded in a concave groove, and FIG. 7 is D of FIG.
-D line enlarged sectional view, FIG. 8 is a side sectional view showing the lining work for the pipeline, FIG. 9 is a sectional side view of the lined pipeline, FIG. 10 is a sectional view taken along line EE of FIG. 9, and FIG. It is a side sectional view showing passage of a cable to a pipe.

In the cable laying and pipe repairing method according to the present invention, as shown in FIGS. 3 to 5, a concave groove 1a having a rectangular cross section is formed in the bottom inner peripheral wall of the pipe 1 such as an aged sewer pipe. The groove 1a is formed in a straight line in the length direction (the horizontal direction in FIGS. 3 and 5 and the direction perpendicular to the paper surface in FIG. 4), and the groove 1a is formed by the cutting robot 2 shown in FIGS.

The cutting robot 2 is introduced into the pipe line 1, and its main body 3 is supported by four bendable pantographs 4 radially provided at an equal angular pitch around the main body 3 so that a total of four airs are supported. It is supported by the bag 5. Each airbag 5 can be inflated and contracted, and in the state shown in the drawing, the airbag 5 is inflated by the compressed air enclosed therein.

By the way, a swing arm 6 is pivotally attached to a tip portion of a main body 3 of the cutting robot 2 by a shaft 7, and a tip end portion of the swing arm 6 is illustrated by a motor (not shown). A rotary grindstone 8 which is rotationally driven in the direction of the arrow is rotatably supported, and a stopper 9 for restricting the cut amount of the rotary grindstone 8 is attached. or,
An arm 10 is provided above the swing arm 6 at the tip of the main body 3.
Is attached, and the swing arm 6 and the arm 1
The spring 11 is compressed between 0 and, and is urged downward (counterclockwise about the shaft 7 in FIG. 1) together with the rotary grindstone 8 and the stopper 9. An index rope 12 is attached to the rear part of the main body 3.

In order to form the groove 1a in the conduit 1, the TV camera (not shown) introduced into the conduit 1 drives the cutting robot 2 while monitoring the inside of the conduit 1 on the ground. To do. Then, the rotating grindstone 8 (not shown) rotates in the direction of the arrow shown in the drawing, and the inner peripheral wall of the conduit 1 is cut by the rotating grindstone 8 to form the groove 1a, but the cut amount (cutting depth) of the rotary grindstone 8 t is regulated by the stopper 9 coming into contact with the inner peripheral wall of the conduit 1. Therefore, as shown in FIGS. 3 to 5, a concave groove 1a having a width b equal to the width of the rotary grindstone 8 and a depth t is formed in a straight line along the length direction on the inner peripheral wall of the conduit 1. . In addition, the cutting robot 2 has a rotating grindstone 8
By the rotational force of the above, the pipe 1 is moved in the direction of the arrow (forward) in FIG. 1 by itself.

When the recessed groove 1a is formed on the inner peripheral wall of the conduit 1 as described above, the cable passage pipe 14 is linearly embedded in the recessed groove 1a as shown in FIGS. 6 and 7. To be done. The outer diameter dD of the pipe 14 is equal to the depth t of the groove 1a.
Since the following (d ≦ t) is set, the pipe 14 does not project upward from the concave groove 1a.

When the work of burying the pipe 14 in the groove 1a is completed, as shown in FIG. 8, the pipe lining material 15 is formed.
The inner peripheral surface of the conduit 1 is lined by a known conduit repairing method using the.

That is, as shown in FIG. 8, the pipe lining material 15 is reversely inserted into the pipe line 1 by fluid pressure. The pipe lining material 15 is made of, for example, a non-woven fabric of polyester, nylon, polypropylene, acrylic or the like. The tubular resin absorbent material is impregnated with a thermosetting resin such as polyester resin or epoxy resin. By mixing the incineration ash of sewage sludge as a filler with the thermosetting resin, it is possible to recycle the incineration ash and reduce the cost of the thermosetting resin. Generally, ceramic powder, calcium carbonate, aluminum hydroxide, ceramics, glass beads, sand, etc. are used as the filler of the thermosetting resin. Although a nonwoven fabric is used as the resin absorbent in this embodiment, the nonwoven fabric may be reinforced with a reinforcing material such as glass mat, glass cloth, carbon cloth, Kevlar or the like.

The pipe lining material 15 is used as the pipe line 1.
When the tube lining material 1 is inserted over the entire length of the pipe,
5 is expanded by fluid pressure to press it against the inner peripheral wall of the pipe line 1, and while maintaining this state, the pipe lining material 15 is heated by any means (for example, hot water, hot air, steam, etc.). In this case, the thermosetting resin impregnated in the pipe lining material 15 is cured, and as shown in FIG. 9 and FIG.
The inner peripheral surface of the is lined with a cured pipe lining material 15. At this time, as shown in FIG.
Since 4 is buried in the concave groove 1a of the pipe line 1, the pipe lining material 15 is not deformed by the pipe 14, and the opening area of the pipe line 1 is not excessively narrowed.

When the lining work for the conduit 1 is completed as described above, the pig 16 is inserted from one end of the pipe 14 as shown in FIG. The pig 16 is made of an elastic material such as nylon or urethane, and a cable 1 such as an optical fiber for communication is provided through a thread 17 such as nylon.
8 are connected. Further, the other end of the pipe 14 has a lid member 1
It is closed by 9, and a vacuum pump 20 is connected to the other end of the pipe 14.

When the vacuum pump 20 is driven and the other end of the pipe 14 is evacuated, the pig 16 inserted into the one end of the pipe 14 is pulled by the negative pressure generated in the pipe 14 and the drawing is performed. 11 thread 1 moved in the direction of arrow 11 and connected to it
7 is drawn into the pipe 14, and by pulling this thread 17, the cable 18 is passed through the pipe 14. In addition, in order to improve the slidability of the pig 16 in the pipe 14, oil is applied to the pig 16.

As described above, the cable 18 is connected to the pipe 1.
4, the pipe 14 is arranged in a straight line along the concave groove 1a of the conduit 1, so that the cable 18 can be easily passed through the pipe 14.

Thus, according to this embodiment, the cable 18
Laying and repair of the pipeline 1 are performed at the same time.
As shown in FIG. 2, the cable 18 passed through the pipe 14 embedded in the pipeline 1 is connected to the relay box 22 installed in each manhole 21, and is guided from the relay box 22 to the ground to realize multimedia. Be used for.

In the above embodiment, the inner peripheral wall of the pipe 1 is provided with 1
Although the two concave grooves 1a are formed, as shown in FIG.
It is also possible to form a plurality of (three in the illustrated example) concave grooves 1a and to embed the cable-conducting pipes 14 in the respective concave grooves 1a. Further, in the above embodiment, the pipe lining material 15 is inserted into the pipe line 1 by fluid pressure, but as shown in FIG. 14, the pipe lining material 15 is directly drawn into the pipe line 1 and Lining material 1
The reversing tube 23 may be reversibly inserted into the inside of the container 5 by fluid pressure. Further, in the above embodiment, the cable passage pipe 14 is embedded in the groove 1a.
The cable body may be directly embedded in the groove 1a.

[0027]

As is apparent from the above description, according to the present invention, a groove is formed in a part of the inner peripheral wall of the pipe line in a straight line in the length direction, and the groove is used for cable passage. After burying the pipe or the cable body, the pipe lining material impregnated with a curable resin was inserted into the pipe, and the pipe lining material was impregnated into the pipe while being pressed against the inner peripheral wall of the pipe. Since the curable resin is hardened, it is possible to lay the cable and repair the pipeline at the same time without further narrowing the opening area of the pipeline, which has the effect of facilitating cable passage. To be

[Brief description of drawings]

FIG. 1 is a side cross-sectional view showing a state in which a groove is formed in a pipeline in the method of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a side cross-sectional view of a pipeline in which a groove is formed in the method of the present invention.

4 is a sectional view taken along line BB of FIG.

5 is a cross-sectional view taken along line CC of FIG.

FIG. 6 is a side sectional view of a pipeline in which a pipe is embedded in a groove in the method of the present invention.

FIG. 7 is an enlarged cross-sectional view taken along the line DD of FIG.

FIG. 8 is a side cross-sectional view showing a lining operation for a pipeline in the method of the present invention.

FIG. 9 is a side sectional view of a pipe lined by the method of the present invention.

10 is a cross-sectional view taken along the line EE of FIG.

FIG. 11 is a side sectional view showing the passage of a cable to a pipe in the method of the present invention.

FIG. 12 is a cross-sectional view showing a wiring example of a cord laid by the method of the present invention.

FIG. 13 is a sectional view of a pipeline showing a modified embodiment of the present invention.

FIG. 14 is a side sectional view of a conduit showing a modified embodiment of the present invention.

FIG. 15 is a sectional view of a pipeline showing a conventional construction method.

[Explanation of symbols]

 1 Pipeline 1a Recessed groove 2 Cutting robot 14 Cable conduit pipe 15 Pipe lining material 16 Pig 18 Cable 20 Vacuum pump

Claims (3)

[Claims] 1. A concave groove is formed in a straight line in a length direction in a part of an inner peripheral wall of a pipe line, a pipe for cable passage or a cable main body is embedded in the concave groove, and then a curable resin is impregnated. A pipe lining / pipe which is characterized in that the pipe lining material formed by the above is inserted into the pipe, and the curable resin impregnated in the pipe lining is pressed while the pipe lining is pressed against the inner peripheral wall of the pipe. Road repair method. 2. The cable laying / pipe repair method according to claim 1, wherein the pipe lining material is reversely inserted into the pipe by fluid pressure. 3. The wire of the cable to the pipe is
The cable laying and pipe repairing method according to claim 1 or 2, wherein the pig connected to the cable is inserted into the pipe and one end of the pipe is evacuated.